gms | German Medical Science

102. Jahrestagung der DOG

Deutsche Ophthalmologische Gesellschaft e. V.

23. bis 26.09.2004, Berlin

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Change of monochromatic aberrations under the influence of tropicamide

Meeting Abstract

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  • corresponding author S. Jurkutat - Klinik für Augenheilkunde der FSU Jena
  • B. Loosberg - Klinik für Augenheilkunde der FSU Jena
  • J. Strobel - Klinik für Augenheilkunde der FSU Jena

Evidenzbasierte Medizin - Anspruch und Wirklichkeit. 102. Jahrestagung der Deutschen Ophthalmologischen Gesellschaft. Berlin, 23.-26.09.2004. Düsseldorf, Köln: German Medical Science; 2004. Doc04dogP 053

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/dog2004/04dog544.shtml

Published: September 22, 2004

© 2004 Jurkutat et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

Text

Objective

For wave front based refractive operations reproduceable measurement of monochromatic aberrations is necessary. When clinically examining a patient in mydriasis before such an operation, an influence of the tropicamide is expected which goes beyond the dilated pupil.

Methods

19 probands aged 20-30 with healthy eyes were tested regarding monochromatic aberrations up to the 4th order after dark adaptation and 15 minutes after dropping the tropicamide. The results of both measurements were related to the same pupil diametre of 3, 4.5 and 6 millimetres and were compared with each other.

Results

The spherical aberration (Z4-0) at a pupil diametre of 4.5 and 6 mm is significantly lower under the influence of the tropicamide than without it. The spherical refraction power (Z2-0) at a pupil diametre of 3-6 mm lies by 0.2 dtp above measurements after dark adaptation. The other Zernike coefficients do not differ.

Conclusions

Because the tropicamide affects beside the M. sphingter pupillae also the M. ciliaris, the lens shape and thereby also the spherical aberration and the sherical refraction power are affected. Therefore, for wave front measurements before refractive operations tropicamide should be avoided.